baber/WOPTO huggingface dataset:
Patent GB-1366008-A (GB)
Title: Metal oxide varistor
IPC: H01C7/102
Filed: 1972-07-13
Abstract: 1366008 Varistors GENERAL ELECTRIC CO 13 July 1972 [22 July 1971] 32801/72 Heading H1K A metal oxide varistor has two electrodes on one face separated by a gap defining the active part of the body. The body may be thick enough to be self-supporting or may be mounted on a glass, ceramic, or polymeric substrate. The varistor may comprise a coating on a ceramic substrate. In various embodiments one electrode extends over the edge of the body and across the second major face (Fig. 4), three electrodes definining two active gaps are formed on one major face (Fig. 6), and the gap is circular, star shaped, tapered and stepped (Figs. 9, 10, 11 and 12 respectively). Two electrodes on one face may be combined with a third electrode on the other face to define a low voltage and a high voltage varistor in the same body (Figs. 7 and 8). As shown, Fig. 13, a varistor 31 having electrodes 32, 35, and mounted on a support 36 is provided with terminals 134, 135 and the active gap is protected with a dielectric glass passivation 136. The device may be mounted within a hermetic housing of a device to be protected against overvoltages or may be provided with a coating 137 of plastic or glass. The varistor may be a sintered ceramic metal oxide, e.g. basically ZnO with other metal oxide additives. The electrodes may be deposited using a mask or an initial overall layer may be formed and selectively removed to form the gap.
Patent GB-1303029-A (GB)
IPC: G06M1/30
Filed: 1971-07-13
Abstract: 1303029 Resettable counters VEEDER INDUSTRIES Inc 13 July 1971 [22 July 1970] 32807/71 Heading G4D Depression (i.e. leftwards displacement) of key 52 shifts a zeroizing member 50 longitudinally, against the bias of spring 54. The member 50 pivotally carries at 62 a doubleslotted lever 60 (described as a whippletree) which initially swings clockwise about transfer pinion shaft 30 to swing resetting comb 40 to the position of Fig. 2 with arms 44 contacting reset cams 26. With continued movement of member 50 the lever 60 is then swung counterclockwise about pivot 68 to withdraw the transfer pinions, after which the rotation of lever 60 is reversed to complete movement of the comb 40 and the resetting of the counter wheels (Fig. 4, not shown). The link 50 is then returned by spring 54, the first movement allowing re-engagement of the transfer pinions by spring 36.
Patent GB-1024153-A (GB)
Title: Sporting practice device
IPC: A63B69/00
Filed: 1962-08-27
Abstract: 1,024,153. Games-practising appliances. F. G. HOOPER. Aug. 27, 1962 [Sept. 1, 1961], No. 32833/62. Heading A6D. [Also in Divisions H1 and H2]. An arrangement for use in practising the swing of striking appliances used in playing games, comprises a bracket for attachment to the appliance, said bracket supporting two spaced sources of light which, as the striking appliance is swung, cause two streaks of light to be seen by the player, the relative position of the streaks of light giving an indication of the accuracy of the swing. The arrangement comprises a bracket 10 having a part 19 for clamping on to the striking appliance, and a transverse boom portion 15, all made from metal coated with a thermoplastic material. The boom comprises two apertures 30, 31 registering with two electric lamps held in a synthetic resin support clipped to the underside of the boom, the lamps being connected to batteries housed in a casing 13. Alternatively the apertures 30, 31 may house reflectors co-operating in use with an external source of light.
Patent GB-1088163-A (GB)
Title: Electrical resistance measurement
Inventor: MICHELL PETER RALPH
IPC: G01N27/04
Filed: 1964-08-12
Abstract: 1,088,163. Resistance measurement. IMPERIAL CHEMICAL INDUSTRIES Ltd. July 12, 1965 [Aug.12, 1964], No.32850/64. Heading G1U. In a method of measuring the resistance of the electrolyte gap in e.g. a mercury cathode cell when electrolysing alkali metal chloride solution, in the presence of a chlorine overvoltage generating a back e.m.f., a voltage proportional to the direct current through the cell is applied to the input 2 of a voltage operated current generating valve or transistor circuit 1, whose current output, proportional to the input voltage, is passed through a potentiometer resistor 3. The voltage across the gap is applied via terminals 7 to an input 6 of a voltage amplifier 5. A voltage from a source 17 is applied in series opposition to this voltage and adjusted to counterbalance the back e.m.f. from the chlorine over-voltage. To the other input of amplifier 5 is applied a voltage tapped off the resistor 3. The amplifier output operates a split phase servo mechanism 9 which adjusts the tapping 4 until a balance is reached. An associated scale 10 then indicates the required resistance.
Patent GB-1268967-A (GB)
Title: Meat refrigeration and dehumidification system
IPC: F25D3/10
Filed: 1969-06-30
Abstract: 1,268,967. Refrigerating. UNION CARBIDE CORP. 30 June, 1965 [1 July, 1968), No. 32857/69. Heading F4H. Liquefied gas from a container 14 is vaporized by heat exchange at 22 with gas circulated in a meat carrying truck 11, and the resultant vapour is passed into the circulating gas through a spray pipe 36. A valve 16 in the liquid line leading from the container 14 controls dispensing of the liquefied gas to maintain the truck temperature as sensed at 17 at a selected level between 35‹ and 50‹ F. Moisture from the gas stream which has condensed on the heat exchanger 22 is collected at 26 and discharged through a pipe 27 so that a dry atmosphere is maintained in the truck to avoid the surface of the meat becoming undesirably wet. The fan 25 which circulates the gas may be driven by an electric motor, Fig. 2 (not shown), or by a second stream of vapour derived from the container 14, Fig. 3 (not shown). The truck from the container 14, Fig. 3 (not shown). The truck door may be associated with a switch, Fig. 4 (not shown), so that when the door is opened, the fan 25 is stopped and the valve 16 closed, and when the door is closed, the fan 25 is started but the valve 16 is prevented by a time delay device from opening for a predetermined time. Any frost which has accumulated on the heat exchanger 22 is thus allowed to clear before liquid is admitted to the heat exchanger.
Patent GB-733376-A (GB)
Title: Purification of sugar solutions
IPC: C13B20/14
Filed: 1952-12-29
Abstract: Metal cations are partially removed from technical sugar solutions, e.g. cane and beet raw juices, carbonation juices, thick juices, syrups, liquors and molasses, by passing the solutions through a filter bed consisting of a weakly acidic cation exchanger which strongly adsorbs organic non-sugars, e.g. colloids and colouring matter, the cation exchanger being produced by oxidizing carbonaceous and carbonizable materials either directly or indirectly.  The cation exchanger may be prepared by oxidizing coal, anthracite or semi-coke in oxygen or an oxygen-containing current of gas at increased temperature, then hydrolysing the product with a solution of an alkali, e.g. caustic soda or caustic potash, and finally treating the hydrolysed product with a dilute acid, e.g. hydrochloric acid.  Coal may be sulphonated with strong sulphuric acid, oleum or chlorosulphuric acid and subjected to pyrolysis to remove strongly acid groups. The cation exchanger may be obtained by pyrolysis of acid sludge, i.e. the residue from sulphuric acid refining of petroleum and like products.  The filter bed may be treated with ammonia so that a mixed bed of H-ion exchanging and NH4-ion exchanging materials, e.g. in the ratio 1 : 1, becomes available for treating the sugar solutions.  The cation exchanger may be regenerated with dilute sulphuric, hydrochloric or sulphurous acid.
Patent GB-669095-A (GB)
Title: Improvements in spark plug construction
IPC: H01T13/24
Filed: 1948-12-21
Abstract: 669,095. Metal-to-ceramic seals. BENDIX AVIATION CORPORATION. Dec. 21, 1948 [Dec. 26, 1947], No. 32978/48. Drawings to Specification. Class 36. [Also in Group XXVII] A copper or metal bushing is secured to the metal casing and centre electrode insulator of a sparking-plug (see Group XXVII) by firstly coating the surfaces to be joined with a suitable flux, such as powdered borax, and finally heating  the metal casing in the vicinity of the bushing  to a dull red and simultaneously applying a pressure of about 3000 pounds. The flux coating on the bushing serves as a lubricant which facilitates the assembly of the parts and also forms a glaze which ensures a gas-tight joint between the abutting surfaces.
Patent GB-1394387-A (GB)
Title: Cable harnessing device
IPC: F16L3/233
Filed: 1972-07-14
Abstract: 1394387 Band clamps BOWTHORPE HELLERMANN LTD 7 June 1973 [14 July 1972] 33015/72 Heading E2B [Also in Division H2] Bundling straps 12, for harnessing electric cables, are spaced along the cable-bundle by an integral strip 10 which has apertures 26 (or semi-closed lateral slots) for the outward passage of any cable leaving the bundle. Each strap has teeth 16 which engage a pawl 24 in a head 18. The device may be of plastics, e.g. nylon.
Patent GB-274352-A (GB)
Title: Improved manufacture of highest-pressure conduits
IPC: B21D51/24
Filed: 1926-12-31
Abstract: 274,352. Grossweischede, J., and Reichenbecher, G. Dec. 31, 1926. Pipes. - High-pressure pipes for turbines &c. are made by cupping a blank a which has been rolled or forged to give it a dense structure, between pairs of dies b, c of successively decreasing .diameter, the cupping being effected while the work is hot. A part of the integral end of the pipe is then removed leaving an inwardlyprojecting flange which is subsequently worked so that the flange projects outwards. A flange is formed at the open end by arresting the work before its end passes through the die in the later stages. The final male die or mandrel may be collapsible, comprising segments e movable longitudinally on a tapered core d, slots f and projections g being provided to limit the relative movement of the core and segments. Successive lengths may be coupled by screw collars, welding &c., and loose flanges may be assembled on the pipes prior to such coupling.
Patent GB-833597-A (GB)
Title: Process for the preparation of threo-1-nitrophenyl-2-acylamino-propane-1.3-diols and of their o-acyl derivatives acylated in the 3-position
Inventor: HAACK ERICH
Filed: 1957-10-23
Abstract: Threo - 1 - nitrophenyl - 2 - acylaminopropane-1 : 3-diols and their 3-monoesters are prepared by the action of the usual nitrating agents, at a reaction temperature below - 40 DEG  C. in the presence of a halogenated hydrocarbon having a melting-point below this temperature, on threo - 1 - phenyl - 2 - acylaminopropane1 : 3-diols or their 3-monoesters, or on compounds which are converted into the diols during the nitration (e.g. threo-5-acylamino-6phenyl-1 : 3-dioxans or their derivatives monoor di-substituted in the 2-position).  Examples describe the preparation of chloramphenicol by the action of highly concentrated nitric acid at about -60 DEG  C. in methylene chloride on D - (-) - threo - 1 - phenyl - 2 - dichloracetylaminopropane - 1 : 3 - diol or D - (-) - threo - 2 : 2 - dimethyl - 5 - dichloroacetylamino - 6 - phenyl - 1 : 3 - dioxan, and of chloramphenicol 3-stearoylglycollate similarly from D-(-)threo - 1 - phenyl - 2 - dichloroacetylaminopropane - 1 : 3 - diol 3 - stearoylglycollate. Specification 803,562 is referred to.
Patent GB-601000-A (GB)
Title: Improvements in or relating to snap action switches
IPC: H01H15/18
Filed: 1945-12-07
Abstract: 601,000. Snap-action switches. SMART & BROWN (ENGINEERS), Ltd., and CLARK, C. W. Dec. 7, 1945, No. 33149. [Class 38 (v)] A snap-action switch comprises a slidable member carrying the movable contacts and a second slidable member actuated manually, the two slidable members being connected by the snap-action mechanism, Fig. 1, shows in plan the base of a switch having two pairs of fixed contacts 3, 4 adapted to be bridged by moving contacts 7, 8 which are pivoted in recesses in a sliding member 5. As shown in Fig. 3, the member 5 has a rib 9 which engages in a groove in the switch base. The member 5 is moved by a manually operated sliding member 6 which is connected to the member 5 by snap-action mechanism consisting of two rods 12 pivoted in a recess in the member 5 and passing at their other ends through holes in the turned-up ends of a member 16 secured to the actuating member 6. The rods 12 are surrounded by helical springs 13 which give the member 5 a snap action after passing in either direction through the dead-centre position. In a modification, the rods 12 are pivoted to the member 6 and the member 16 is carried by the member 5. The member 16 may be bimetallic so that on heating of the switch parts due, for example, to dust settling on the contacts, the member 16 bends and compresses the springs 13 which thereby increase the pressure between the contacts.
Patent GB-465868-A (GB)
Title: Improvements in and relating to differentials
IPC: F16D41/08
Filed: 1936-12-04
Abstract: 465,868. Differential gearing; freewheel clutches. WITHERLY, W. C. Dec. 4,1936, No. 33280. [Class 80 (ii)] In a differential gear wherein a sleeve 11 drives a pair of axles 1, 2 through reversible free-wheel clutches, the sleeve is formed, for each clutch, with a number of chordal passages 14 which intersect the inner periphery of the sleeve, each passage being fitted with a pair of balls or rollers 15 urged by springs 16 towards a race groove 8 formed on a boss 3 or 4 secured on the corresponding shaft. Pairs of rods 18 and 19 are longitudinally slidable in the sleeve 11 between each pair of balls, these rods being formed with grooves 21 which are spaced to correspond with the spacing of the grooves 8. The grooves on the rods 18 are, however, staggered with respect to the grooves on the rods 19. The rods are all secured to a ring 22 which is movable by a rod 25 through a slidable sleeve 23 provided with forks 24 engaging the ring 22. Each pair of rods 18 and 19 may be replaced by a single flat bar provided with corresponding grooves. With the sleeve 23 in the position shown, the rods 19 hold one ball of each pair inoperative, while the rods 18 allow the other balls to wedge in the grooves 8. Forward unidirectional drive is thus transmitted. By moving the sleeve 23 to the left, so that the rods 18 obstruct one ball of each pair and the rods 19 allow the other balls to engage, reverse unidirectional drive may be transmitted.
Patent GB-625922-A (GB)
Title: Process of manufacturing oils or oily products
IPC: C11C3/00
Filed: 1946-11-11
Abstract: Modified oils or oily products of increased drying properties &c. which may be polymerized or are already polymerized in some degree, are obtained by subjecting a mixture of a fatty acid and a fatty oil to the action of acetylene at increased temperature and in the presence of a catalyst.  The mixture may contain a diluent to assist in the removal of the catalyst after the reaction &c. The fatty acid may be a fatty acid of a natural oil or a synthetic fatty acid; fatty acids specified comprise soya bean oil fatty acid, rape-oil fatty acid, linseed oil fatty acid, fatty acids first obtained when distilling the oxidation product of paraffins and having 5 to 10 carbon atoms in the molecule, and also fatty acids last obtained when distilling the oxidation product of paraffins and having 20 to 28 carbon atoms in the molecule.  The fatty oils specified comprise linseed oil, castor oil, linseed stand oil and soya bean oil.  Gases containing acetylene may also be used.  Increased pressure may be used but atmospheric pressure is preferred.  In the latter case, the reaction temperature generally ranges between 150-275 DEG  C.  The catalyst may comprise cadmium or zinc compounds such as zinc white, and cadmium acetate.  The diluents exemplified comprise white spirit and mineral spirits.  The fatty acid and fatty oil may be used in equal proportions.
Patent GB-1026065-A (GB)
Title: Improvements in an apparatus and paper or like frames for making diapositives
IPC: G03D15/10
Filed: 1964-08-18
Abstract: 1,026,065. Mounting transparencies. H.HERMANN, [trading as HEINRICH HERMANN], Aug. 18,1964 [Sept. 5, 1963], No.33630/64. Addition to 929,420. Heading G2C. The apparatus of the parent Specification is modified in that the mounting plate and frame 5 are each provided with means which permits the insertion of the frame into the plate in one position only. The plate is provided with a semicircular projection and the frame with a semicircular recess 38, each of which lie off the axes of symmetry of the frame. A further marking 39 (a light strip on a dark ground) may be applied for easier sorting of finished diapositives.
Patent GB-864800-A (GB)
Title: Improvements in or relating to electromagnetic wave transmission devices
IPC: H01P1/19
Filed: 1958-10-24
Abstract: 864,800. Pulsing carrier frequencies. HUGHES AIRCRAFT CO. Oct. 24, 1958 [Nov. 29, 1957], No. 34179/58. Class 40(5) [Also in Groups XXXV and XL(b)] A non-reciprocal waveguide transmission device for, e.g. pulse modulation purposes includes, in addition to the usual ferrite element, a second ferrite element (which may be integral with the first) for providing a magnetic flux return path. By situating both elements within the waveguide it is possible to reduce the reluctance of the magnetic circuit and to obviate eddy current losses. A Faraday-rotation element in the form of a ferrite rod 50, Fig. 3, is axially arranged in a circular or square waveguide 10. Embedded within the element is a solenoid 52 arranged so that the magnetic field lies entirely within the ferrite material. In another arrangement (Fig. 1), the return flux path comprises a ferrite cylinder 24 contiguous to the waveguide wall. A solenoid 22 is situated in the annular space between the cylinder 24 and the Faraday element 18. The device shown has a rectangular waveguide input 12 and two output terminals 14, 16 of the circulator type having their minor axes displaced at 45 degrees or any other convenient angle from the minor axis of the input guide 12. The device is normally biased to provide the wave rotation necessary to couple the input terminal with one of the output terminals, periodic switching to the other output terminal being obtained by pulsing the solenoid. The output waveguide 14 may be replaced by a resistive vane positioned radially within the waveguide 10. By this means it is possible to operate the device as an isolator. Pairs of circulator terminals may be arranged at both ends of the waveguide 10. In a modification (Fig. 4, not shown), the return magnetic flux path is provided by a number of C-shaped ferrite yokes radially arranged around the element 18 and each carrying its own solenoid. In the modification of Fig. 6, the Faraday element 18 is supported in a square waveguide 70 by four symmetrically arranged conductive vanes 72. These are provided with apertures to accommodate a solenoid 22 and a cylindrical ferrite element 24 which provides the return path. The vanes 72 are provided with steps to improve matching.
Patent GB-1156461-A (GB)
Title: Improvements in or relating to Printing Methods and apparatus
Inventor: COPPING GEOFFREY PERCY
IPC: B41F17/00
Filed: 1965-08-10
Abstract: 1,156,461. Selective printing; printing apparatus. POSTMASTER GENERAL. 8 Aug., 1966 [10 Aug., 1965], No. 34184/65. Headings B6C and B6F. Apparatus for imprinting code marks on a surface comprises at least one printing pin 22, at least one container 1 holding printing medium, a reservoir 4 holding printing medium, means defining a flow path from the container(s) to the reservoir and back, means for holding the or each pin 22 in a rest position with its printing face located in the flow path, support means for supporting a surface to be printed adjacent the printing face(s) of the pin(s) such that the surface is normal to the direction of movement of the or each pin and means for moving the or each pin between the rest position and a printing position in which the face of the pin is in contact with the surface. Preferably a selected combination of such pins are moved into contact with the surface. As shown in Figs. 4 and 5, molten printing medium (heated by electric cartridge heaters in holes 60) is held in upper containers 1A and 1B. Cranked pins 22A, 22B are slidably mounted in guides 11A and 11B and also in guide tubes 11C and 11D. Printing medium flows from container 1A through orifices 12, see Fig. 4, over the printing surfaces of pins 22A into trough 66 and is then similarly directed over the surfaces of pins 22B and into reservoir 4 from which it is recycled by impeller 62 into container 1A. Plate 69 is apertured at 70A and 70B to allow the pins to contact a postal item to be printed, which item is held against plate 69. The pins may be moved by a requisite combination of rotating cams (28, Fig. 1) and following levers (24). When a pin has been moved into contact with the surface to be printed, further movement of its lever (24) comprises a spring (25) so that the pin does not damage the surface. In a preferred embodiment each pin carries a latching extension (50, Fig. 2) associated with a latch (52) and an armature (53) of a solenoid (54), such that rotation of the cam of a particular pin produces direct movement of the pin to its printing position only if the latch is disengaged by actuation of its solenoid. In other embodiments two reservoirs of printing medium, with the pins situated in the flow path from one to the other, are immersed in an electrically heated water bath or are each provided with heating coils. The printing medium may consist of particles of a solid phosphorescent material (e.g. a cyanuric acid-formaldehyde resin activated by carbazole sulphonic acid) dispersed in a carrier (e.g. a 5% solution of polystyrene or gum dammor in diphenyl).
Patent GB-862320-A (GB)
Title: Improvements in or relating to apparatus for measuring displacements and/or eccentricities or rotary shafts
IPC: G01B7/312
Filed: 1959-10-09
Abstract: 862,320. Measuring shaft unbalance electrically. PHILIPS ELECTRICAL INDUSTRIES Ltd. Oct. 9, 1959 [Oct. 14, 1958], No. 34293/59. Class 40 (1). The vibration of a rotating shaft is measured by a ferromagnetic ring assembled on the shaft, co-operating with two, stationary, diametrically located coils L1, L2 connected into an A.C. bridge, whose unbalance voltage is amplified at V, fed through a high pass filter F and demodulated at G to give a reading on a meter M indicative of the shaft vibration. The filter F cuts off at the lower side-band frequency of the modulated signal, thereby eliminating spurious signal components due to any permanent magnetization of the ring. Axial vibration of the shaft can be similarly measured.
Patent GB-923550-A (GB)
Title: Five-lens objective
IPC: G02B9/34
Filed: 1959-10-12
Abstract: 923,550. Photographic objectives. CARL ZEISS-STIFTUNG, [trading as CARL ZEISS [Firm of]]. Oct. 12, 1959 [Oct. 30, 1958], No. 34532/59. Class 97 (1). A photographic objective consists of five lenses of which the first is an asymmetrical collective lens which turns its surface of lower curvature towards the second lens which is also an asymmetrical collective lens which turns its surface of lower curvature towards the third lens while the third lens is an asymmetrical dispersive lens which turns its surface of deeper curvature towards the fourth lens and the fourth lens is also an asymmetrical dispersive lens which turns its surface of deeper curvature towards the fifth lens and the fifth lens is a biconvex collective lens, the objective being characterized in that:- (a) The sum of the airspaces between tne individual lenses is smaller than 30% but greater than 10% of the overall length of the objectives, wherein the overall length itself is greater than 80% of the focal length; The first lens is preferably a meniscus concave towards the second lens and the latter is preferably cemented to the third lens. Optical data are given for one embodiment of the objective illustrated.